CollegeHigh School / Physics

Light Intensity versus Distance

The relative light intensity versus distance from a point light source is plotted. As the Light Sensor is moved by hand, the string attached to the Light Sensor that passes over the Rotary Motion Sensor pulley to a hanging mass causes the pulley to rotate, measuring the position. The experiment is repeated with an extended source.

Various curves are fitted to the data to see which fits better.

PreviewDownload

Student Files

49_Light_Intensity_vs_Distance.cap 7.14 MB
49_Light_Intensity_vs_Distance.docx 582.33 KB
49_Light_Intensity_vs_Distance.pdf 739.94 KB

Teacher Files

Sign In to your PASCO account to access teacher files and sample data.

Featured Equipment

550 Universal Physics System

Universal 550 Physics Experiment Bundle

This system provides a complete set of labs for mechanics, heat, light, sound, and electromagnetism.

550 Universal Interface

550 Universal Interface

The 550 is fast, powerful, and incredibly affordable. It offers half the ports and many of the same features as our 850 Interface in a smaller package.

High Sensitivity Light Sensor

PASPORT High Sensitivity Light Sensor

Designed to perform visible light studies from low intensity spectral studies to daylight. Built in oversampling reduces noise. PASPORT version.

PASPORT Rotary Motion Sensor

The PASPORT Rotary Motion Sensor measures position, velocity, and angular and linear acceleration.

Basic Optics System

Basic Optics System

A complete optics bench that includes all the components required to do introductory optics experiments.

Many lab activities can be conducted with our Wireless, PASPORT, or even ScienceWorkshop sensors and equipment. For assistance with substituting compatible instruments, contact PASCO Technical Support. We're here to help.

Copyright Disclaimer: Section 107 of the Copyright Act of 1976 makes allowance for “fair use” for purposes of teaching, scholarship, education and research. Reproduction under any other circumstances, without the written consent of PASCO, is prohibited.
Source: Lab #49

Universal 550 Physics Experiment Manual

Light Intensity versus Distance